EKG certification Certification EKG Equipment & Artifact Troubleshooting 3

Question 1

In a properly functioning EKG machine, the standardization mark at the beginning of each lead should measure:

Accepted Answer

10 mm tall and 0.2 sec wide

Answer

5 mm tall and 0.1 sec wide

Answer

15 mm tall and 0.4 sec wide

Answer

20 mm tall and 0.2 sec wide

Question 2

Which of the following describes the function of a right leg (RL/N) electrode in a 12-lead EKG?

Accepted Answer

It serves as a ground electrode to reduce electrical interference

Answer

It records the inferior leads

Answer

It measures right ventricular activity

Answer

It balances the precordial leads

Question 3

What is the most likely cause of an intermittent or 'dropped' signal on one lead of a 12-lead EKG?

Accepted Answer

Loose or partially detached electrode on that lead

Answer

Machine calibration error

Answer

60 Hz interference

Answer

Incorrect paper speed setting

Question 4

EKG paper has two types of grid squares. The larger square is made up of how many small squares?

Accepted Answer

25 small squares

Answer

10 small squares

Answer

5 small squares

Answer

20 small squares

Question 5

A technician notices the QRS complexes are clipping off the top of the paper. What is the correct adjustment?

Accepted Answer

Switch to half standard sensitivity (5 mm/mV)

Answer

Increase paper speed to 50 mm/sec

Answer

Switch to double standard sensitivity (20 mm/mV)

Answer

Use the monitor filter

Question 6

Which statement about disposable EKG electrodes is correct?

Accepted Answer

They contain a conductive gel that maintains good skin contact

Answer

They can be reused on the same patient if removed carefully

Answer

They do not require skin preparation before placement

Answer

They should be stored in a warm environment to extend shelf life